So, what we're saying is that the money in a bank account is not base money, it is units of credit. However, you cannot separate the two completely because at any time, any and all depositors (except time deposits that we'll ignore for now) can convert that credit into base money. I'm assuming that physical cash is base money, is that incorrect?
Therefore, if all that "credit" is convertible on demand to money... it just about might as well be money. Also, as policies have changed over the years (last 200 or so), it has allowed more and more credit by requiring less reserves, thus resulting in a larger and larger total amount of "credit" out there.
But I think this example does not accurately reflect the banking situation. Because what you suggest would be fine and that would be 100% reserve banking. Because once I loan my mom $100, I can no longer access that $100. And when she lends it to a friend, she can no longer access it. In your description, at ALL times there is only $100 available to circulate. But the banking situation is different. When I "loan", aka deposit, my $100 to the bank, I can still get it out any time I want. And then the bank loans out that $100 to another person who then "loans" it back to the bank. The bank then lends it out to someone else, etc... but the problem is that every single person still has immediate access to all that "credit". Thus, in the bank situation, there really is a great deal more "credit" available to circulate than the base money. So... for example, if I write you a check, what I'm really doing in effect is authorizing the bank to transfer X credit from my account and put it into your account? There's no real money involved at all?
In other words, sure, it's credit and not "real money". However, it spends just like money. So, for the economy at large, there are many more units circulating than there is base money. And... in general, that means that we're not paying money for anything--all we're doing is transferring debt around.
Well... is physical cash base money? If so, and thus credit is convertible to base money on demand, then the proportion would matter because that would determine how easy it is to cause a "run on the bank". If there is only $100 base money and $1 billion in credits, as soon as someone comes along and wants $200 cash, that doesn't work.
A quick reply (i hope)
Yes base money, the things that the fed creates is coins, notes and electronic bank reserves. All the thing that fed creates out of "thin air".
Credit or the note that says "Thanks man for the loan. I'll pay you back later, and a bit for your trouble. Promise". Its not money. At some point your friend is going to pay it back. Or if he forgets you are going to demand it back. He will give you the money and you will give him that credit IOU note, which he destroys. You would have a hard time, if you tried to go to the shop and buy something with that IOU note. The shopkeeper does not trust you or your friend. You will have to come back once you have real money.
Same goes for the bank, once you put your money it a account, it is lent back the back door and you are left with a note that says "Thanks man, I'll pay you back later". Someone already spent your money. You cant buy anything with that IOU note. What you can do is tell the bank that you want your money back now. And they say "Okay, hold on one sec. Here you go". The reason why they are able to do that is because they say to all their borrowers. "Hey, you remember that money i lent you. Well im a bit short at the moment so i need a bit of it back. Don't worry you don't have to pay back the whole thing, but just a little."
Such a bank has little or no reserves at all. All the money it ever lent from people it loaned out. Its a bank with zero or only a couple of percentages in reserves or in its vaults. The bank has no use for keeping much money in its vaults. They would just gather dust there, as lenders as a whole rarely take out all their money.
Fractional banking is the method that allows banks to connect short term lenders with long term borrowers. It works because as a whole all those short term lenders behave as one long term lender. Statistically short term lenders more often keep their money in the bank, rather than demand it out. How much money do you have in the wallet right now, compared to in your bank account. I bet you have more in the bank than in the wallet. Thats the kind of human behavior that make fractional reserve banking work.
Edit: I avoided the question a bit, about credit being used as money. In the case of the credit IOU note that is created when you loan money to a freind directly, few businesses will take that as payment. Some might. Maybe you, your friend, or your friends friend has a shop. And they will accept that IOU credit note. If they do, your friend will not pay you, but the shop owner the money back. So still no new money has been created.
The same should go for the credit that is created when you loan money to a borrower, thru the bank. Theoretically the bank could print IOU credit money with the banks logo.. with a text saying "This is proof of a $100 deposit. The bank promises to pay the holder of this note $100 back on request." (some banks in Northern Ireland does this). When you put money into your bank account, the bank would lend out that money and give your IOU credit note. You could take that IOU credit note and try buy something in the shop. The shopkeeper might tell you to come back with real money, or he might trust the bank to keep the promise, he might even have an account with the same bank. You could then buy something with that note, but no new money was created. Why? because now you will not get the real money back that you put into the bank account in the first place, rememver you gave away the certificate, the IOU credit note. The shopkeeper now has it, and he will get back the money that you lent out to the borrower that spent your money in the first place.. Hope that makes sense.
Cheers